22400553 has 8 divisors (see below), whose sum is σ = 34134208. Its totient is φ = 12800304.

The previous prime is 22400533. The next prime is 22400591. The reversal of 22400553 is 35500422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22400553 - 2⁹ = 22400041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1066693 = 22400553 / (2 + 2 + 4 + 0 + 0 + 5 + 5 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22400513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533326 + ... + 533367.

It is an arithmetic number, because the mean of its divisors is an integer number (4266776).

Almost surely, 2^22400553 is an apocalyptic number.

It is an amenable number.

22400553 is a deficient number, since it is larger than the sum of its proper divisors (11733655).

22400553 is a wasteful number, since it uses less digits than its factorization.

22400553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066703.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 22400553 is about 4732.9222474070. The cubic root of 22400553 is about 281.8942689993.

Adding to 22400553 its reverse (35500422), we get a palindrome (57900975).

The spelling of 22400553 in words is "twenty-two million, four hundred thousand, five hundred fifty-three".